晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/include/bind9/dns/keyvalues.h
/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
 */


#ifndef DNS_KEYVALUES_H
#define DNS_KEYVALUES_H 1

/*! \file dns/keyvalues.h */

/*
 * Flags field of the KEY RR rdata
 */
#define DNS_KEYFLAG_TYPEMASK	0xC000	/*%< Mask for "type" bits */
#define DNS_KEYTYPE_AUTHCONF	0x0000	/*%< Key usable for both */
#define DNS_KEYTYPE_CONFONLY	0x8000	/*%< Key usable for confidentiality */
#define DNS_KEYTYPE_AUTHONLY	0x4000	/*%< Key usable for authentication */
#define DNS_KEYTYPE_NOKEY	0xC000	/*%< No key usable for either; no key */
#define DNS_KEYTYPE_NOAUTH	DNS_KEYTYPE_CONFONLY
#define DNS_KEYTYPE_NOCONF	DNS_KEYTYPE_AUTHONLY

#define DNS_KEYFLAG_RESERVED2	0x2000	/*%< reserved - must be zero */
#define DNS_KEYFLAG_EXTENDED	0x1000	/*%< key has extended flags */
#define DNS_KEYFLAG_RESERVED4	0x0800	/*%< reserved - must be zero */
#define DNS_KEYFLAG_RESERVED5	0x0400	/*%< reserved - must be zero */
#define DNS_KEYFLAG_OWNERMASK	0x0300	/*%< these bits determine the type */
#define DNS_KEYOWNER_USER	0x0000	/*%< key is assoc. with user */
#define DNS_KEYOWNER_ENTITY	0x0200	/*%< key is assoc. with entity eg host */
#define DNS_KEYOWNER_ZONE	0x0100	/*%< key is zone key */
#define DNS_KEYOWNER_RESERVED	0x0300	/*%< reserved meaning */
#define DNS_KEYFLAG_REVOKE	0x0080	/*%< key revoked (per rfc5011) */
#define DNS_KEYFLAG_RESERVED9	0x0040	/*%< reserved - must be zero */
#define DNS_KEYFLAG_RESERVED10	0x0020	/*%< reserved - must be zero */
#define DNS_KEYFLAG_RESERVED11	0x0010	/*%< reserved - must be zero */
#define DNS_KEYFLAG_SIGNATORYMASK 0x000F /*%< key can sign RR's of same name */

#define DNS_KEYFLAG_RESERVEDMASK (DNS_KEYFLAG_RESERVED2 | \
				  DNS_KEYFLAG_RESERVED4 | \
				  DNS_KEYFLAG_RESERVED5 | \
				  DNS_KEYFLAG_RESERVED9 | \
				  DNS_KEYFLAG_RESERVED10 | \
				  DNS_KEYFLAG_RESERVED11 )
#define DNS_KEYFLAG_KSK		0x0001	/*%< key signing key */

#define DNS_KEYFLAG_RESERVEDMASK2 0xFFFF	/*%< no bits defined here */

/* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */
#define DNS_KEYALG_RSAMD5	1       /*%< RSA with MD5 */
#define DNS_KEYALG_RSA		DNS_KEYALG_RSAMD5
#define DNS_KEYALG_DH		2       /*%< Diffie Hellman KEY */
#define DNS_KEYALG_DSA		3       /*%< DSA KEY */
#define DNS_KEYALG_NSEC3DSA	6
#define DNS_KEYALG_DSS		DNS_ALG_DSA
#define DNS_KEYALG_ECC		4
#define DNS_KEYALG_RSASHA1	5
#define DNS_KEYALG_NSEC3RSASHA1	7
#define DNS_KEYALG_RSASHA256	8
#define DNS_KEYALG_RSASHA512	10
#define DNS_KEYALG_ECCGOST	12
#define DNS_KEYALG_ECDSA256	13
#define DNS_KEYALG_ECDSA384	14
#define DNS_KEYALG_ED25519	15
#define DNS_KEYALG_ED448	16
#define DNS_KEYALG_INDIRECT	252
#define DNS_KEYALG_PRIVATEDNS	253
#define DNS_KEYALG_PRIVATEOID	254     /*%< Key begins with OID giving alg */

/* Protocol values  */
#define	DNS_KEYPROTO_RESERVED	0
#define DNS_KEYPROTO_TLS	1
#define DNS_KEYPROTO_EMAIL	2
#define DNS_KEYPROTO_DNSSEC	3
#define DNS_KEYPROTO_IPSEC	4
#define DNS_KEYPROTO_ANY	255

/* Signatures */
#define DNS_SIG_RSAMINBITS	512	/*%< Size of a mod or exp in bits */
#define DNS_SIG_RSAMAXBITS	2552
	/* Total of binary mod and exp */
#define DNS_SIG_RSAMAXBYTES	((DNS_SIG_RSAMAXBITS+7/8)*2+3)
	/*%< Max length of text sig block */
#define DNS_SIG_RSAMAXBASE64	(((DNS_SIG_RSAMAXBYTES+2)/3)*4)
#define DNS_SIG_RSAMINSIZE	((DNS_SIG_RSAMINBITS+7)/8)
#define DNS_SIG_RSAMAXSIZE	((DNS_SIG_RSAMAXBITS+7)/8)

#define DNS_SIG_DSASIGSIZE	41
#define DNS_SIG_DSAMINBITS	512
#define DNS_SIG_DSAMAXBITS	1024
#define DNS_SIG_DSAMINBYTES	213
#define DNS_SIG_DSAMAXBYTES	405

#define DNS_SIG_GOSTSIGSIZE	64

#define DNS_SIG_ECDSA256SIZE	64
#define DNS_SIG_ECDSA384SIZE	96

#define DNS_KEY_ECDSA256SIZE	64
#define DNS_KEY_ECDSA384SIZE	96

#define DNS_SIG_ED25519SIZE	64
#define DNS_SIG_ED448SIZE	114

#define DNS_KEY_ED25519SIZE	32
#define DNS_KEY_ED448SIZE	57

#endif /* DNS_KEYVALUES_H */

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